Methods and devices for forming a tissue fold

1. A method of forming a fold of tissue in the stomach, comprising the steps of:

providing a device having a tissue engaging element and a mold, the mold having a recess and an opening leading to the recess, mold also having two lateral openings which communicate with the recess and with the opening, the two lateral openings being L-shaped and extending proximally;

introducing the device down a patient's throat to the stomach;

engaging stomach tissue with the tissue engaging element outside the recess;

drawing the stomach tissue into the mold through the opening using the tissue engaging element, the stomach tissue forming a tissue fold as the stomach tissue enters the opening and the tissue engaging element enters the recess, the tissue fold being compressed as the tissue fold enters the tissue mold, the tissue fold being drawn proximally through the opening, the L-shaped lateral openings and into the tissue mold, the tissue fold being compressed together as the stomach tissue is drawn through the opening, the drawing step being carried out with lateral edges of the tissue fold extending out of the two lateral openings;

fastening the tissue layers together to maintain the tissue fold.

2. The method of claim 1 , wherein:

the drawing step is carried out with the tissue engaging element taking a curved path within the tissue mold.

3. The method of claim 1 , wherein:

the drawing step is carried out with a longitudinal axis of the tissue engaging element changing in angular orientation with respect to a longitudinal axis of the tissue mold by at least 45 degrees.

4. The method of claim 1 , further comprising the step of:

reducing a volume of the stomach around the device.

5. The method of claim 4 , wherein:

the reducing step is carried out during the drawing step.